Colt Model 1910 .45 ACP - Serial Number 5

Colt Model 1910 Automatic Pistol Serial Number 5, Caliber .45
ACP - Only eight of this model were made to demonstrate the
new style grip angle of 74 degrees, as opposed to the earlier
angle of 84 degrees. The change made the pistol point more
naturally and was used on all subsequent models. ARM 927